Data from a poll conducted by Travelocity led to the follow-ing estimates: Approximately 40% of travelers check their work e- mail while on vacation, about 33% take cell phones on vacation in order to stay connected with work, and about 25% bring laptop computers on vacation (San Luis Obispo Tribune, December 1, 2005).
a. What additional information about the survey would you need in order to decide if it is reasonable to generalize these estimates to the population of all American adult travelers?
b. Assuming that the given estimates were based on a representative sample, do you think that the estimates would more likely be closer to the actual population values if the sample size had been 100 or if the sample size had been 500? Explain.